How the Scientific Farmer Fertilizes his Soil

How to Assist the Small-Scale Farmer

The key messages in my presentation are taken from the recently completed International Assessment of Agricultural Science and Technology for Development (IAASTD), which was approved by 60 developed and developing countries in South Africa in April, 2008. The IAASTD was co-sponsored by the World Bank, FAO, UNEP, UNESCO, UNDP, WHO and the GEF. The key findings of the Global Summary for Decision-...

How Mangroves Salinize the Soil How Mangroves Salinize the Soil

A transient one-dimensional model of the vertical movement of water and salt in the mangrove root zone is investigated. This is an extension of a previous steady state model which assumed that the ability of the mangrove roots to take up water is uniformly distributed throughout the soil and that the root water uptake is reduced if there is nonzero salt concentration around the roots. We show h...

Ettore Majorana: His Scientific and Human Personality

This article reports part of the invited talk delivered by the author at the “International Conference on Majorana Legacy" held at the Department of Physics, University of Catania, Catania, Italy, on 5 and 6 Octorber, 2006: Conference organized for celebrating the 100th anniversary of the birth of the Italian theoretical physicist Ettore Majorana; probably the brightest Italian theoretician of ...

John Schellman and his scientific work.

A survey of his scientific work

When Jack van Lint was appointed as full professor at the Eindhoven University of Technology at the age of 26 he combined a PhD in number theory with a very open scientific mind. It took a sabbatical visit to Bell Laboratories in 1966 to make him understand that a new and fascinating field of applied mathematics was emerging: discrete mathematics. It fascinated and inspired him for the rest of ...